What's a bangkon? It's one of those
The bangkon has a single-edge blade - usually clip point - about that long. The defining characteristic is the hilt. If it has a guard it's circular and fairly narrow. The hilt itself is a stylized rhinocerous. Yours is pretty standard except that the horn is usually shorter. The sheath doesn't typically have the curved extension. Many have a piece of leather wrapped around the upper part with a flap at the end so that the sheath stays more securely in a belt.
I can't remember exactly where they're from. I think Visayan, but that could just be my memory playing tricks.